diff options
Diffstat (limited to 'gcc/real.h')
| -rw-r--r-- | gcc/real.h | 61 |
1 files changed, 58 insertions, 3 deletions
@@ -95,10 +95,44 @@ extern char test_real_width # endif #endif -/* Declare functions in real.c. */ -/* Initialize the emulator. */ -extern void init_real_once PARAMS ((void)); +/* Describes the properties of the specific target format in use. */ +struct real_format +{ + /* Move to and from the target bytes. */ + void (*encode) (const struct real_format *, long *, const REAL_VALUE_TYPE *); + void (*decode) (const struct real_format *, REAL_VALUE_TYPE *, const long *); + + /* The radix of the exponent and digits of the significand. */ + int b; + + /* log2(b). */ + int log2_b; + + /* Size of the significand in digits of radix B. */ + int p; + + /* The minimum negative integer, x, such that b**(x-1) is normalized. */ + int emin; + + /* The maximum integer, x, such that b**(x-1) is representable. */ + int emax; + + /* Properties of the format. */ + bool has_nans; + bool has_inf; + bool has_denorm; + bool has_signed_zero; + bool qnan_msb_set; +}; + + +/* The target format used for each floating floating point mode. + Indexed by MODE - QFmode. */ +extern const struct real_format *real_format_for_mode[TFmode - QFmode + 1]; + + +/* Declare functions in real.c. */ /* Binary or unary arithmetic on tree_code. */ extern void real_arithmetic PARAMS ((REAL_VALUE_TYPE *, int, @@ -156,9 +190,13 @@ extern void real_from_integer PARAMS ((REAL_VALUE_TYPE *, unsigned HOST_WIDE_INT, HOST_WIDE_INT, int)); +extern long real_to_target_fmt PARAMS ((long *, const REAL_VALUE_TYPE *, + const struct real_format *)); extern long real_to_target PARAMS ((long *, const REAL_VALUE_TYPE *, enum machine_mode)); +extern void real_from_target_fmt PARAMS ((REAL_VALUE_TYPE *, const long *, + const struct real_format *)); extern void real_from_target PARAMS ((REAL_VALUE_TYPE *, const long *, enum machine_mode)); @@ -171,6 +209,23 @@ extern void real_2expN PARAMS ((REAL_VALUE_TYPE *, int)); extern unsigned int real_hash PARAMS ((const REAL_VALUE_TYPE *)); + +/* Target formats defined in real.c. */ +extern const struct real_format ieee_single_format; +extern const struct real_format ieee_double_format; +extern const struct real_format ieee_extended_motorola_format; +extern const struct real_format ieee_extended_intel_96_format; +extern const struct real_format ieee_extended_intel_128_format; +extern const struct real_format ieee_quad_format; +extern const struct real_format vax_f_format; +extern const struct real_format vax_d_format; +extern const struct real_format vax_g_format; +extern const struct real_format i370_single_format; +extern const struct real_format i370_double_format; +extern const struct real_format c4x_single_format; +extern const struct real_format c4x_extended_format; + + /* ====================================================================== */ /* Crap. */ |